Abstract: A mobile vehicle service station including an enclosed service vehicle to provide an indoor-like working area similar to a bay for servicing other vehicles. The extendable bay comprises the rear doors opening into two side walls and top member outwardly extending from a closed position at the rear of the service vehicle to engaging the upper portion of the open doors. The one end of the bay at the rear portion of the vehicle includes means for lowering its floor to ground level; whereas the end opposite thereof, enclosed on three sides as aforesaid, is open to permit the entry of the vehicle to be worked upon. The service station vehicle includes the necessary apparatus, test instruments, tools, power source, spare parts, and the like for the intended service or repairs.